SDDM: how to make Wayland the default session?

I’m running into an sddm-greeter crash and would like to see, if a Wayland session helps.

I added this to my configuration.nix:

services.xserver.desktopManager.plasma5.runUsingSystemd = true;
services.xserver.displayManager.sessionPackages = [
    (old: { passthru.providedSessions = [ "plasmawayland" ]; }))

How can I make Wayland the default session, so I will be able to test? The way I see it, overrideAttrs should replace the passthru.providedSessions list, but I am still getting autologged into an X11 session and then can’t log out due to the sddm-greeter crash. I can launch a Wayland session from a virtual terminal with dbus-run-session startplasma-wayland just fine.

Answer is
services.xserver.displayManager.defaultSession = "plasmawayland";
Although autologin is now broken, but I will start another thread.


Sorry to reopen the thread, but I was looking for the answer to this…

services.xserver.displayManager.defaultSession = “plasmawayland”;

does not work for me :frowning: - is there an updated solution?

There is not. I use LightDM for now due to some catastrophic bug in SDDM. Would be great to have a new SDDM release as they have a ton of unreleased fixes.

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So lightDM seems a fix for the wayland issue :slight_smile:

Having tried it, I need to configure for multiple monitors (including rotation). Are there any nixos friendly guides out there???

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